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223. Miller, R. R. 1946a. The need for icthyological SURVEY surveys of the major rivers of western HISTORY North America. Science 104(2710):517- FISH 519. SPECIES LIST DISTRIBUTION The need for surveys of the western rivers may COLORADO R. be summarized as follows; information on native and introduced species would be obtained, data are needed for critical appraisal of fish management problems created by the construction of dams and the haphazard introduction of alien species, surveys are needed to aid in the interpretation of Pleistocene history, relative to archaeological sites in the Southwest, through the collection of fossils. Article includes a brief species list with historical distributions. 224. Miller, R. R. 1946b. Gila cypha, a remarkable ENDANG. FISH new species of cyprinid fish from the DISTRIBUTION Colorado River, Grand Canyon, Arizona. DESCRIPTION Journal Washington Academy of Science TAXONOMY 36(12):409-415. COLORADO R. 2 This article describes the humpback chub, Gila cypha. The Gila complex in the Colorado basin is discussed, suggesting several forms are eco- subspecies. 225. Miller, R. R. 1950. Notes on the cutthroat TAXONOMY and rainbow trouts with the description of FISH new species from the Gila River, New COLORADO R. Mexico. Occasional Papers, Museum of 5, 31 Zoology, University of Michigan, Ann Arbor, No. 529. 42 pp. The status of the trouts of western North America is reviewed and suggestions are made for solving the complicated systematics of this plastic group. Salmo gilae, a new species of trout from the headwater region of Gila River, New Mexico, is described. 226. Miller, R. R. 1951. Bait fishes of the lower REy Colorado River from Lake Mead, Nevada to FISH Yuma, Arizona with a key to their identifi- COLORADO R. cation. California Fish and Game 38(1):7- 42. 94